foundation/eclipselink.core.test/src/it/java/org/eclipse/persistence/testing/tests/queries/oracle/HierarchicalOneToOneTest.java

/*
 * Copyright (c) 1998, 2021 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// Contributors:
//     Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.testing.tests.queries.oracle;

import java.util.*;
import org.eclipse.persistence.queries.*;
import org.eclipse.persistence.testing.models.mapping.*;
import org.eclipse.persistence.expressions.*;

public class HierarchicalOneToOneTest extends HierarchicalQueryTest
{
  public HierarchicalOneToOneTest()
  {
  }
  @Override
  public Vector expectedResults() {
    Vector v = new Vector();
    Employee norman = (Employee)getSession().readObject(Employee.class, new ExpressionBuilder().get("firstName").equal("Norman"));
    v.addElement(norman);
    Employee manager = norman.getManager();
    while(manager != null) {
      v.addElement(manager);
      manager = manager.getManager();
    }
    return v;
  }
  @Override
  public ReadAllQuery getQuery() {
    ReadAllQuery query = new ReadAllQuery(Employee.class);
    ExpressionBuilder builder = new ExpressionBuilder();
    Expression startWith = builder.get("firstName").equal("Norman");
    Expression connectBy = builder.get("manager");
    query.setHierarchicalQueryClause(startWith, connectBy, null);
    return query;
  }

}